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PCE
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DIFF Subgroup
H01J 19/34

forming part of the envelope

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Details of vacuum tubes of the types covered by group > Non-electron-emitting electrodes; Screens > Anodes > forming part of the envelope

CPC:

Details of vacuum tubes of the types covered by group H01J21/00 > Non-electron-emitting electrodes; Screens > Anodes > forming part of the envelope

No child classifications to compare. This is a leaf node in both IPC and CPC.